diff --git a/.github/workflows/apptainer-build-deploy.yml b/.github/workflows/apptainer-build-deploy.yml
index 7ffe376b..4f09ca28 100644
--- a/.github/workflows/apptainer-build-deploy.yml
+++ b/.github/workflows/apptainer-build-deploy.yml
@@ -31,7 +31,7 @@ jobs:
     steps:
 
       - name: Check out code for the container builds
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Build Container
         run: |
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
index 3b9c60ec..53138390 100644
--- a/.github/workflows/codecov.yml
+++ b/.github/workflows/codecov.yml
@@ -11,7 +11,7 @@ jobs:
     name: Codecov
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.ref || github.ref }}
         fetch-depth: 1
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 7385b813..78c1feb2 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Pull Repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           fetch-tags: true
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
index d43aaf7d..0d281af6 100644
--- a/.github/workflows/linter.yml
+++ b/.github/workflows/linter.yml
@@ -12,7 +12,7 @@ jobs:
     name: Lint Code Base with Ruff
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: astral-sh/ruff-action@v3
         with:
           version: "latest"
diff --git a/.github/workflows/pixi_tests.yml b/.github/workflows/pixi_tests.yml
index 995d37f5..acf55ed1 100644
--- a/.github/workflows/pixi_tests.yml
+++ b/.github/workflows/pixi_tests.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout Repo
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/pr_rev_cli_tests.yml b/.github/workflows/pr_rev_cli_tests.yml
index 2ad0f850..355cee91 100644
--- a/.github/workflows/pr_rev_cli_tests.yml
+++ b/.github/workflows/pr_rev_cli_tests.yml
@@ -7,13 +7,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: checkout gaps
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.ref }}
         fetch-depth: 1
         path: gaps
     - name: checkout reV
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         repository: nrel/reV
         fetch-depth: 1
diff --git a/.github/workflows/publish_to_pypi.yml b/.github/workflows/publish_to_pypi.yml
index ae9605eb..42b774bc 100644
--- a/.github/workflows/publish_to_pypi.yml
+++ b/.github/workflows/publish_to_pypi.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/super_linter.yml b/.github/workflows/super_linter.yml
index 61e05068..b7940806 100644
--- a/.github/workflows/super_linter.yml
+++ b/.github/workflows/super_linter.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout Code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
             # super-linter needs the full git history to get the
             # list of files that changed across commits
diff --git a/.github/workflows/tests_tox.yml b/.github/workflows/tests_tox.yml
index 0cee35f9..63bd74e1 100644
--- a/.github/workflows/tests_tox.yml
+++ b/.github/workflows/tests_tox.yml
@@ -19,7 +19,7 @@ jobs:
         python-version: ['3.13', '3.12', '3.11', '3.10', '3.9']
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
@@ -64,7 +64,7 @@ jobs:
         os: [ubuntu-latest, macos-latest]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
diff --git a/.github/workflows/wildows_pytests.yml b/.github/workflows/wildows_pytests.yml
index 42360daa..bcef7a4d 100644
--- a/.github/workflows/wildows_pytests.yml
+++ b/.github/workflows/wildows_pytests.yml
@@ -11,7 +11,7 @@ jobs:
         python-version: ['3.10', 3.11, 3.12, 3.13]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.ref }}
         fetch-depth: 1